Starting to implement server side issue form validation
Move issue's save logic from the controller to the model
Fix vote id overriding issue id
Redirect back to the issue screen
Do not allow question mark char
Redirect to the project if id is empty
Remove duplicate chars
Merge branch 'framework' into form-validation-2

Conflicts:
	templates/tracker/issue.add.twig
Check method now uses translation
Merge branch 'framework' into form-validation-2
Merge pull request #160 from joomla/form-validation-2

Implement client side form validation - part 2